listAverage() returns the average number in a list. Which of these functions does this correctly? unction listAverage (list){= =var sumfor ( var 0 0; 1< list.length]; 0++) {sumsum + list O(sum / list.length)returnfunction listAverage (list){-0:var sumfor ( var 1-0; < list.length|; 8++)) {|sumsum + list (i)sum / list.length|returnfunction listAverage (list){=var sum = 0;return(sum / list.lengthfor ( var i-0; i< list.length ; 0++) {sumsum + list[i] ; function listAverage (list){=var sumfor ( var 1-0; 1< list.length]; 0++|) {sum =sum + list [8)sum / list.length ) ;return

Correct Answer The function listAverage() accepts a list as the argument and initialized the…

Answered: listAverage() returns the average…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

listAverage() returns the average number in a list. Which of these functions does this correctly?

unction listAverage (list){= =
var sum
for ( var 0 0; 1< list.length]; 0++) {
sum
sum + list O
(sum / list.length)
return
function listAverage (list){-
0:
var sum
for ( var 1-0; < list.length|; 8++)) {|
sum
sum + list (i)
sum / list.length|
return
function listAverage (list){=
var sum = 0;
return
(sum / list.length
for ( var i-0; i< list.length ; 0++) {
sum
sum + list[i] ;

function listAverage (list){=
var sum
for ( var 1-0; 1< list.length]; 0++|) {
sum =
sum + list [8)
sum / list.length ) ;
return

Expert Solution

Step 1

Correct Answer
- The function listAverage() accepts a list as the argument and initialized the variable sum as 0.
- In this function, the for loop iterate over the length of the list and adds each value of the list to the variable sum.
- In the final step, the return statement first evaluates the average value then returns the result of the expression as the final value.
Incorrect Answer
- In the second option, the return statement does not evaluate the average value, it can cause a run-time error.
- In the third option, the return statement is misplaced.
- In the fourth option, again the return statement is misplaced, it should be placed inside the curly-braces.

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